The electrical double layer (EDL) plays a central role in electrochemical energy systems, impacting charge transfer mechanisms and reaction rates. The fundamental importance of the EDL in interfacial electrochemistry has motivated researchers to develop theoretical and experimental approaches to assess EDL properties. In this contribution, we review recent progress in evaluating EDL characteristics such as the double-layer capacitance, highlighting some discrepancies between theory and experiment and discussing strategies for their reconciliation. We further discuss the merits and challenges of various experimental techniques and theoretical approaches having important implications for aqueous electrocatalysis. A strong emphasis is placed on the substantial impact of the electrode composition and structure and the electrolyte chemistry on the double-layer properties. In addition, we review the effects of temperature and pressure and compare solid–liquid interfaces to solid–solid interfaces.

中文翻译：

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如何评估和预测双电层特性。对电催化的意义


双电层 （EDL） 在电化学能源系统中起着核心作用，影响电荷转移机制和反应速率。EDL 在界面电化学中的根本重要性促使研究人员开发理论和实验方法来评估 EDL 特性。在这篇文章中，我们回顾了评估 EDL 特性（如双电层电容）的最新进展，强调了理论和实验之间的一些差异，并讨论了它们之间的协调策略。我们进一步讨论了对水相电催化具有重要意义的各种实验技术和理论方法的优点和挑战。重点强调电极组成和结构以及电解质化学性质对双层特性的实质性影响。此外，我们回顾了温度和压力的影响，并将固-液界面与固-固界面进行了比较。